The Sophos Threatsaurus explains the facts about threats to your computers and to your data in simple, easy-to-follow language. Its a free download no registration, no password, no email address. Theres no jargon, no sales blurb, no hyperbole and no sense of impending doom like you get from some guides to online safety. It’s a history of viruses and malware from 1949 (really!) to the present day, and with a fascinating history, it tells you what you need to know.”]